Ratio
- Vitruvius, De Architectura, Book I, Chapter II — The Fundamental Principles of Architecture: "1. Architecture depends on Order (in Greek τἁξις), Arrangement (in Greek διἁθεσις), Eurythmy, Symmetry, Propriety,..."
- Vitruvius, De Architectura, Book V, Chapter V, Paragraphs 1-3: Plan of the Theatre: "The plan of the theatre itself is to be constructed as follows. Having fixed upon..."
- Uncategorized, Illustration, Entrance to Gerum Church: [Visual Content]
- Uncategorized, Illustration, Ground Plan of Globe Theatre: [Visual Content]
- Uncategorized, Illustration, Map of the Forum at Pompeii: [Visual Content]
- Iamblichus, Life of Pythagoras, P. 80. I swear by him who the tetractys found.: "The tetrad was called by the Pythagoreans every number, because it comprehends in itself all..."
- Robert Fludd, Ars Memoriae, Theatrum Orbi: [Visual Content]
- Leonardo da Vinci, Notebooks, Vitruvian Man: [Visual Content]